Linear Accelerator (linac) Patents (Class 315/505)
  • Patent number: 11483920
    Abstract: A continuous wave (CW) electron accelerator for the treatment of industrial streams including an electron beam source, a modified high efficiency slot coupled cavity, at least one focusing magnet positioned surrounding the accelerator to contain the beam in the accelerator, an efficient radio frequency power supply means for supplying power of a radio frequency to the cavity to induce a TM01 accelerating mode in the cavity, an electron beam spreader or raster, a fixed magnet array or two-dimensional scanning magnet for deflecting the accelerated beam into a desired shape, and an exit window for extracting the deflected electron beam. The accelerator includes a graded-beta cavity to enable use with a low-power pulsed electron source. The accelerator benefits from a low wall-power loss accelerating cavity that is energized with efficient RF sources, enabling it to be operated in continuous wave mode.
    Type: Grant
    Filed: December 13, 2020
    Date of Patent: October 25, 2022
    Assignee: JEFFERSON SCIENCE ASSOCIATES, LLC
    Inventors: Fay Hannon, Robert Rimmer, Shaoheng Wang
  • Patent number: 11476087
    Abstract: An ion implantation system, including an ion source and extraction system, arranged to generate an ion beam at a first energy, and a linear accelerator, disposed downstream of the ion source, the linear accelerator arranged to receive the ion beam as a bunched ion beam accelerate the ion beam to a second energy, greater than the first energy. The linear accelerator may include a plurality of acceleration stages, wherein a given acceleration stage of the plurality of acceleration stages comprises: a drift tube assembly, arranged to conduct the ion beam; a resonator, electrically coupled to the drift tube assembly; and an RF power assembly, coupled to the resonator, and arranged to output an RF signal to the resonator. As such, the given acceleration stage does not include a quadrupole element.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: October 18, 2022
    Assignee: Applied Materials, Inc.
    Inventor: Frank Sinclair
  • Patent number: 11456518
    Abstract: A method for manufacturing a radio frequency (RF) applicator which includes covering a ceramic insert with a coating, wherein the ceramic insert has dimensions that substantially match an internal volume of an open-ended, hollow waveguide, and wherein the ceramic insert has a recess therein configured to accept a radio frequency emitter, heating the waveguide to a temperature that is above a melting point of the coating, placing the coated ceramic insert into the internal volume of the heated waveguide, wherein the internal volume is completely filled except for the recess, and cooling the waveguide, ceramic insert, and coating to a temperature below the melting point of the coating so that the coating solidifies and fills gaps between facing surfaces of the insert and the waveguide.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: September 27, 2022
    Assignee: ENDRA Life Sciences Inc.
    Inventors: Christopher Nelson Davis, Charlton Chen, Michael M. Thornton
  • Patent number: 11438999
    Abstract: This disclosure provides systems, methods, and apparatus related to devices and methods for creating hollow, near-hollow, and parabolic plasma channels. In one aspect, a device includes a block of material and a cooling system. The block of material defines a channel having a cylindrical shape and having a first open end and a second open end. An axis of the channel lies along a straight line. The block of material further defines a first gas port and a second gas port. The first gas port and the second gas port are in fluid communication with channel. The cooling system is operable to cool the channel to below the freezing point of a gas.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: September 6, 2022
    Assignee: The Regents of the University of California
    Inventors: Wim Leemans, Kelly Swanson, Hann-Shin Mao, Don Syversrud, Anthony Gonsalves, Tyler Sipla
  • Patent number: 11165427
    Abstract: Some embodiments include a system comprising: an RF source configured to generate an RF signal; an RF frequency control circuit coupled to the RF source and configured to adjust a frequency of the RF signal; an accelerator structure configured to accelerate a particle beam in response to the RF signal; and control logic configured to: receive a plurality of settings over time for the RF source; adjust the RF signal in response to the settings; and adjust a setpoint of the RF frequency control circuit in response to the settings.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: November 2, 2021
    Assignee: Varex Imaging Corporation
    Inventor: John C Turner
  • Patent number: 10806946
    Abstract: According to some aspects, a carrier configured for use with a broadband x-ray source comprising an electron source and a primary target arranged to receive electrons from the electron source to produce broadband x-ray radiation in response to electrons impinging on the primary target is provided. The carrier comprising a housing configured to be removeably coupled to the broadband x-ray source and configured to accommodate a secondary target capable of producing monochromatic x-ray radiation in response to incident broadband x-ray radiation, the housing comprising a transmissive portion configured to allow broadband x-ray radiation to be transmitted to the secondary target when present, and a blocking portion configured to absorb broadband x-ray radiation.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: October 20, 2020
    Assignee: Imagine Scientific, Inc.
    Inventor: Eric H. Silver
  • Patent number: 10714225
    Abstract: A continuous wave ion linear accelerator PET radioisotope system is disclosed. The system includes a high brightness H? ion source, a continuous wave RF quadrupole structure, and continuous wave RF interdigital structures to accelerate the ion beam to about 14 MeV. A high energy beam transport system is also described that includes a photo-detachment beam splitter and a magnet lattice for forming the proton beam into a beam having a Waterbag beam profile. The system also includes one or more targets upon which the proton beam is incident. The targets are either a high power metallic target oriented at about 10 degrees or a low thermal conductivity target oriented at about 35 degrees. The invention includes a method of producing PET isotopes by use of the systems described.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: July 14, 2020
    Assignee: PN Labs, Inc.
    Inventor: Robert J. Ylimaki
  • Patent number: 10645793
    Abstract: A method and system for automatically tuning hollow structures, can include pressurized balloons located in one or more targeted cells of a hollow structure of a device having a hollow structures and respective cells. A pressurized balloon can be inserted into a targeted cell so as to localize plastic deformation to the targeted cell using prescribed values of global force and balloon pressure. A pair of inflate/deflate rods associated with an independent air supply for the pressurized balloon can inflate or deflate the pressurized balloon without affecting other pressurized balloons. The pair of inflate/deflate rods can be automatically insertable or removable from the hollow structure by controlled motorized motions.
    Type: Grant
    Filed: October 26, 2019
    Date of Patent: May 5, 2020
    Assignee: FERMI RESEARCH ALLIANCE, LLC
    Inventors: Mohamed Awida Hassan, Donato Passarelli
  • Patent number: 10485088
    Abstract: Methods and systems for non-invasively tuning dressed multicell cavities. A multicell cavity can be plastically deformed as result of introducing a customized balloon to a cavity and then pressurizing the balloon to a targeted cell while applying a global force on the cavity flanges. The pressurized balloons localize the plastic deformation to the targeted cells using prescribed values of both global force and balloon pressure. Such an approach allows for the tuning of dressed cavities without removal of the helium vessel.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: November 19, 2019
    Assignee: Fermi Research Alliance, LLC
    Inventors: Mohamed Awida Hassan, Donato Passarelli
  • Patent number: 10440809
    Abstract: An RF accelerating cavity includes: a housing having an inner peripheral surface in a tubular shape and conductivity at least on a surface; and accelerating cells inside the housing and each made of a dielectric including, at a central part, an opening through which a charged particle passes. The housing includes a cylindrical barrel portion, with end plates at both ends. The accelerating cells are disposed between the end plates. Each accelerating cell includes: a cylindrical barrel portion having a diameter smaller than an inner diameter of the cylindrical barrel portion of the housing; and a circular disk portion provided inside the cylindrical barrel portion to be fixed to the cylindrical barrel portion, and disposed such that a plate surface is orthogonal to the passing axis of a charged particle, and provided with the opening.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: October 8, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD.
    Inventors: Mitsuhiro Yoshida, Daisuke Satoh, Nobuyuki Shigeoka, Sadao Miura
  • Patent number: 10398017
    Abstract: An RF accelerating cavity includes: a housing having an inner peripheral surface in a tubular shape and conductivity at least on a surface; and accelerating cells inside the housing and each made of a dielectric including, at a central part, an opening through which a charged particle passes. The housing includes a cylindrical barrel portion, with end plates at both ends. The accelerating cells are disposed between the end plates. Each accelerating cell includes: a cylindrical barrel portion having a diameter smaller than an inner diameter of the cylindrical barrel portion of the housing; and a circular disk portion provided inside the cylindrical barrel portion to be fixed to the cylindrical barrel portion, and disposed such that a plate surface is orthogonal to the passing axis of a charged particle, and provided with the opening.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 27, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD.
    Inventors: Mitsuhiro Yoshida, Daisuke Satoh, Nobuyuki Shigeoka, Sadao Miura
  • Patent number: 10051721
    Abstract: A compact radio-frequency quadrupole ‘RFQ’ accelerator for accelerating charged particles, the RFQ accelerator comprising: a bunching section configured to have a narrow radio-frequency ‘rf’ acceptance such that only a portion of a particle beam incident on the bunching section is captured, and wherein the bunching section bunches the portion of the particle beam; an accelerating section for accelerating the bunched portion of the particle beam to an output energy; and, a means for supplying radio-frequency power.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: August 14, 2018
    Assignee: CERN—EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH
    Inventors: Alessandra Lombardi, Maurizio Vretenar, Serge Mathot, Alexej Grudiev
  • Patent number: 9900203
    Abstract: A system and method for generating high power pulses including a photoconductive semiconductor switch (PCSS), a laser for triggering the PCSS and a bipolar pulse generator coupled to the PCSS. The bipolar pulse generator is activated when the PCSS is triggered. A bipolar pulse is generated by the activated bipolar pulse generator. A modulator unit modulates the bipolar pulse to create a modulated bipolar pulse. The modulator unit is a nonlinear transmission line (NLTL).
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: February 20, 2018
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Simon Y. London, Alexander B. Kozyrev, Stuart E. Clark
  • Patent number: 9586701
    Abstract: An electron acceleration device using thermionic fission cells and an electromagnetic scoop coil for power. A power control junction and electron injector control that feeds free electrons in packets into the acceleration components that consist of a series of induction linac module units, having quadrupole magnet units in series between the induction module units. Has on-board xenon gas for a deep space electron source. At the high speed electrons exit from the device, deflector plates control the exit path of the electrons to direct the course of a craft.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: March 7, 2017
    Inventor: Paul Howard Conner
  • Patent number: 9402298
    Abstract: A method of manufacturing a radio frequency accelerator that accelerates charged particles injected into a second-stage linear accelerator from a first-stage linear accelerator includes a step of setting a value of a power distribution factor R for the power distributor to supply radio frequency power to the second-stage linear accelerator and a value of a ratio L/? of a length L of the matching section between the outlet of the first-stage linear accelerator and the inlet of the second-stage linear accelerator to the angular frequency ? of the radio frequency power, so that a charged particle beam is extracted from the second-stage linear accelerator over a range of the total radio frequency power wider than a widest allowable range among allowable total radio frequency power ranges determined for each phase of charged particles on the basis of phase acceptance of the second-stage accelerator.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: July 26, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kengo Sugahara, Kazushi Hanakawa, Yasuto Kishii, Kazuo Yamamoto
  • Patent number: 9326366
    Abstract: The relative position of an RF waveform and electron bunches in a linear accelerator is controlled by appropriate control of the accelerator electronics. Thus the energy given to any particular electron bunch can be controlled by altering the position of amplitude peaks of the RF driving field relative to the electron bunch. This control can be applied simultaneously and independently to all electron bunches in a bunch train. An output X-ray pulse is provided by the contributions of multiple electron bunches when they hit one or more targets. When more energetic electrons hit the target, more energetic X-rays are produced. Thus this controllable electron bunch energy and intensity can provide intra-pulse control of X-ray energy.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 26, 2016
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventor: Anatoly Krasnykh
  • Patent number: 9142383
    Abstract: Illustrative embodiments of the present disclosure are directed to devices and methods for X-ray monitoring. Various embodiments of the present disclosure use a target that incorporates a monitor layer. The monitor layer is disposed adjacent to a target layer so that electrons that pass through the target layer enter the monitor layer. As electrons enter the monitor layer, electrical charge is generated within the monitor layer. This electrical charge is measured and used to determine a characteristic of the X-ray generation within the target layer.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: September 22, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Zilu Zhou, Joel Lee Groves
  • Patent number: 9129714
    Abstract: A method and isotope linac system are provided for producing radio-isotopes and for recovering isotopes. The isotope linac is an energy recovery linac (ERL) with an electron beam being transmitted through an isotope-producing target. The electron beam energy is recollected and re-injected into an accelerating structure. The ERL provides improved efficiency with reduced power requirements and provides improved thermal management of an isotope target and an electron-to-x-ray converter.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: September 8, 2015
    Assignee: UChicago Argonne, LLC
    Inventors: John Noonan, Dean Walters, Matt Virgo, John Lewellen
  • Patent number: 9125287
    Abstract: A separated-orbit bisected energy-recovered linear accelerator apparatus and method. The accelerator includes a first linac, a second linac, and a plurality of arcs of differing path lengths, including a plurality of up arcs, a plurality of downgoing arcs, and a full energy arc providing a path independent of the up arcs and downgoing arcs. The up arcs have a path length that is substantially a multiple of the RF wavelength and the full energy arc includes a path length that is substantially an odd half-integer multiple of the RF wavelength. Operation of the accelerator includes accelerating the beam utilizing the linacs and up arcs until the beam is at full energy, at full energy executing a full recirculation to the second linac using a path length that is substantially an odd half-integer of the RF wavelength, and then decelerating the beam using the linacs and downgoing arcs.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: September 1, 2015
    Assignee: Jefferson Science Associates, LLC
    Inventor: David R. Douglas
  • Patent number: 9107281
    Abstract: According to the drift tube linear accelerator of the invention, its acceleration cavity is configured with a center plate and a pair of half cylindrical tubes, wherein the center plate includes a ridge, stems connecting the ridge and drift tube electrodes, and the drift tube electrodes, and wherein the acceleration cavity is configured, as seen in cross section perpendicular to a beam-acceleration center axis, whose inner diameter in X-direction that is perpendicular to a central axis in planar direction in which the stem of the center plate extends and that is passing through the beam-acceleration center axis, is longer than whose inner diameter in Y-direction parallel to the central axis in planar direction.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: August 11, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuo Yamamoto, Nobuyuki Haruna, Takahisa Nagayama, Hiromitsu Inoue, Takayuki Kashima
  • Patent number: 9072156
    Abstract: The devices, systems and techniques disclosed here can be used to reduce undesired effects by magnetic field induced eddy currents based on a diamagnetic composite material structure including diamagnetic composite sheets that are separated from one another to provide a high impedance composite material structure. In some implementations, each diamagnetic composite sheet includes patterned conductor layers are separated by a dielectric material and each patterned conductor layer includes voids and conductor areas. The voids in the patterned conductor layers of each diamagnetic composite sheet are arranged to be displaced in position from one patterned conductor layer to an adjacent patterned conductor layer while conductor areas of the patterned conductor layers collectively form a contiguous conductor structure in each diamagnetic composite sheet to prevent penetration by a magnetic field.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 30, 2015
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: George J. Caporaso, Brian R. Poole, Steven A. Hawkins
  • Patent number: 9040936
    Abstract: A method of bunch length compression method for a free electron laser (FEL) that avoids parasitic compressions by 1) applying acceleration on the falling portion of the RF waveform, 2) compressing using a positive momentum compaction (R56>0), and 3) compensating for aberration by using nonlinear magnets in the compressor beam line.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: May 26, 2015
    Assignees: JEFFERSON SCIENCE ASSOCIATES, LLC, LOS ALAMOS NATIONAL SECURITY, LLC
    Inventors: David R. Douglas, Stephen Benson, Dinh Cong Nguyen, Christopher Tennant, Guy Wilson
  • Patent number: 9041318
    Abstract: A cyclotron that accelerates an ion using a magnetic field includes a hollow yoke and an ion source that is provided in the yoke and generates an ion. The ion source includes a conductive cylindrical body and a filament disposed in the cylindrical body. A current is supplied from a power supply to the filament, and a direction of the current supplied to the filament is changed.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: May 26, 2015
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Takuya Miyashita, Kazutomo Matsumura
  • Patent number: 9030134
    Abstract: Man-portable radiation generation sources and systems that may be carried by hand to a site of interest by one or two people, are disclosed. Methods of use of such sources and systems are also disclosed. Battery operated radiation generation sources, air cooled radiation generation sources, and charged particle accelerators, are also disclosed. A radiation generation source, a radiation scanning system, and a target assembly comprising target material having a thickness of less than 0.20 mm are also disclosed.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: May 12, 2015
    Assignee: Vanan Medical Systems, Inc.
    Inventors: David Whittum, James E. Clayton, George Merdinian
  • Patent number: 9031200
    Abstract: The disclosure relates to systems and methods for interleaving operation of a standing wave linear accelerator (LINAC) for use in providing electrons of at least two different energy ranges, which can be contacted with x-ray targets to generate x-rays of at least two different energy ranges. The LINAC can be operated to output electrons at different energies by varying the power of the electromagnetic wave input to the LINAC, or by using a detunable side cavity which includes an activatable window.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 12, 2015
    Assignee: Accuray Incorporated
    Inventors: Ching-Hung Ho, Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
  • Publication number: 20150084550
    Abstract: The present disclosure discloses an electron linear accelerator system. In the present disclosure, a fast-switching dual-path microwave system is proposed, wherein, one path can be directly connected to an accelerating tube, and the other path can be input into the accelerating tube after a magnitude of the microwave power is changed by devices such as an attenuator, a power divider, a pulse compressor or even an amplifier etc., so as to achieve fast switch of the power input into the accelerator and adjust the energy output by the accelerator.
    Type: Application
    Filed: September 16, 2014
    Publication date: March 26, 2015
    Inventors: Chuanxiang TANG, Jiaru SHI, Qingxiu JIN, Huaibi CHEN, Wenhui HUANG
  • Patent number: 8975816
    Abstract: A RF generator includes a structure having an input section, an output section, and an opening extending between the input section and the output section, wherein the output section has a first cavity and a second cavity, and wherein the first and second cavities are spaced apart from each other so that they are electromagnetically uncoupled from each other. A method of providing RF energy, includes receiving an electron beam, providing a first RF energy through a first cavity, wherein the first RF energy is generated using the electron beam, and providing a second RF energy through a second cavity, wherein the second RF energy is generated using the electron beam, wherein the first cavity and the second cavity are spaced apart from each other so that they are electromagnetically uncoupled from each other.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: March 10, 2015
    Assignee: Varian Medical Systems, Inc.
    Inventors: Glenn P. Scheitrum, George Caryotakis
  • Patent number: 8947021
    Abstract: An accelerator includes an inflector through which a beam entering from an ion source passes and which introduces the beam to an acceleration orbit. The inflector includes a beam convergence unit that converges the beam passing through the inflector. A cyclotron, which accelerates a beam in a convoluted acceleration orbit, includes magnetic poles, D-electrodes, and an inflector. The magnetic poles generate a magnetic field in a direction perpendicular to the acceleration orbit. The D-electrodes generate a potential difference, which accelerates the beam, in the acceleration orbit. A beam, which enters in an incident direction perpendicular to the acceleration orbit, passes through the inflector, and the inflector bends the beam so as to introduce the beam to the acceleration orbit. The inflector includes a beam convergence unit that converges the beam passing through the inflector.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: February 3, 2015
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventor: Hiroshi Tsutsui
  • Publication number: 20150015167
    Abstract: A linear proton accelerator includes a plurality of accelerator components arranged after one another, and a proton source and a plurality of accelerating units. The accelerator further includes a reticular support structure for supporting the accelerator components. The support structure is shaped as a prism with a polygonal cross-section, and has a plurality of side faces joining opposite ends of the prism. The support structure is arranged concentrically with respect to the accelerator components.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 15, 2015
    Inventors: Donatella UNGARO, Jacopo NARDULLI
  • Patent number: 8933651
    Abstract: The invention comprises a flattened magnet coil system that reduces space between a first magnet turning section and a second magnet turning section in a synchrotron accelerator, which reduces or eliminates need for one or more quadrupole focusing elements in the accelerator. Optionally, a coil, in the flattened magnetic coil system, is wrapped about a central metal member between yoke members of a magnet. The coil has a first width and a first thickness along the length of the magnet and a second width and a second thickness along the end of the magnet where the first width is larger than the second width and the second thickness is larger than the first thickness allowing a smaller distance between the first magnet turning section and the second magnet turning section while maintaining current flow in the coil.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: January 13, 2015
    Inventors: Vladimir Balakin, Yury Valyaev
  • Patent number: 8907309
    Abstract: The invention relates to a method and apparatus for control of a charged particle cancer therapy system. A treatment delivery control system is used to directly control multiple subsystems of the cancer therapy system without direct communication between selected subsystems, which enhances safety, simplifies quality assurance and quality control, and facilitates programming. For example, the treatment delivery control system directly controls one or more of: an imaging system, a positioning system, an injection system, a radio-frequency quadrupole system, a ring accelerator or synchrotron, an extraction system, a beam line, an irradiation nozzle, a gantry, a display system, a targeting system, and a verification system. Generally, the control system integrates subsystems and/or integrates output of one or more of the above described cancer therapy system elements with inputs of one or more of the above described cancer therapy system elements.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: December 9, 2014
    Inventor: Stephen L. Spotts
  • Patent number: 8908720
    Abstract: A directed-energy irradiating apparatus includes an FEL apparatus and an HPM apparatus. The FEL apparatus accelerates free electrons by using a microwave supplied from a microwave source to irradiate an FEL beam and outputs a remaining microwave. The HPM apparatus irradiates an HPM beam generated based on the remaining microwave outputted from the FEL apparatus. It is possible to destroy a target even in a situation that a destruction effect by the FEL beam cannot expected, while maintaining the destruction ability of the FEL beam.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: December 9, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shingo Nishikata, Yuki Uchiyama, Hiroyuki Daigo, Ryuichi Matsuda, Shinya Ishii, Hiroki Uchida
  • Patent number: 8878432
    Abstract: A RF accelerator system includes an accelerator, a RF source coupled to the accelerator for providing RF power to the accelerator, a control for adjusting a frequency of the RF power provided by the RF source through a frequency range, and a sensor for sensing a response resulted from an operation of the accelerator based at least in part on the adjusted frequency of the RF power through the frequency range. A method of diagnosing a RF spectrum in an accelerator system includes providing RF power to an accelerator, adjusting a frequency of the RF power through a frequency range, and sensing a response resulted from an operation of the accelerator, the response being based at least in part on the adjusted frequency of the RF power through the frequency range.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: November 4, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventors: Gongyin Chen, John C. Turner
  • Publication number: 20140299782
    Abstract: An apparatus for generating x-rays includes an electron beam generator and a first device arranged to apply an RF electric field to accelerate the electron beam from the generator. A photon source is arranged to provide photons to a zone to interact with the electron beam from the first device so as to generate x-rays via inverse-Compton scattering. A second device is arranged to apply an RF electric field to decelerate the electron beam after it has interacted. The first and second devices are connected by RF energy transmission means arranged to recover RF energy from the decelerated electron beam as it passes through the second device and transfer the recovered RF energy into the first device.
    Type: Application
    Filed: October 24, 2012
    Publication date: October 9, 2014
    Inventor: Andrei Seryi
  • Publication number: 20140265939
    Abstract: A dual polarity transmission line structure that can provide high-voltage pulses of very short duration, such as can be incorporated in a compact accelerator of charged particles as well as other applications, is presented. The exemplary structure has a transmission line, formed a pair of conducting strip with dielectric between them, and a pair of switches. Each of the switches is connected between one of the conducting strips and a charging section, so that when the switches are off, the capacitor plates that are respectively connected to a first and a second of the switches are charged to voltage levels above and below the level at which the first and second conductive strips are set. A pulse is then generated by turning on the switches. Multiple such structures can be stacked to provide a pulse generating system.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Compact Particle Acceleration Corporation
    Inventor: Cameron Hettler
  • Patent number: 8836248
    Abstract: An apparatus to monitor a condition of a solid state charge device (SSCD) useful in electrostatic printing includes a power supply and a frequency detector. The power supply provides current to the SSCD, and includes a resonant controller. The frequency detector senses a frequency associated with the current, and since the frequency is representative of the condition of the SSCD, the frequency detector thereby monitors the condition of the SSCD. A method of monitoring the condition of the SSCD includes providing current to the SSCD using a power supply, and sensing a frequency associated with the current. The power supply includes a resonant controller, and the frequency is representative of the condition of the SSCD, and thus the method thereby monitors the condition of the SSCD. A corresponding computer-readable medium is also disclosed.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: September 16, 2014
    Assignee: Xerox Corporation
    Inventor: Hendrikus Adrianus Anthonius Verheijen
  • Patent number: 8836250
    Abstract: Provided herein are systems and methods for operating a traveling wave linear accelerator to generate stable electron beams at two or more different intensities by varying the number of electrons injected into the accelerator structure during each pulse by varying the electron beam current applied to an electron gun. The electron beams may be used to generate x-rays having selected doses and energies, which may be used for cargo scanning or radiotherapy applications.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: September 16, 2014
    Assignee: Accuray Incorporated
    Inventors: Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
  • Patent number: 8823291
    Abstract: The present invention relates to a dual-frequency resonant cavity (6) for cyclotron which includes a dee (10), a pillar (20), and a conducting enclosure (40) surrounding the pillar and the dee, an end of the pillar being connected to the base of the conducting enclosure and an opposite end of the pillar (20) supporting the dee (10). The conducting enclosure and the pillar form a transmission line comprising at least three portions (20a, 20b, 20c), each portion having a characteristic impedance (Zc1, Zc2, Zc3). The characteristic impedance Zc2 of the intermediate portion (20b) is substantially lower than the characteristic impedances Zc1 et Zc3 of the two other portions (20a, 20b), which makes it possible to have the cavity resonate according to two modes in order to produce two distinct frequencies, without having to make use of moving components such as for example sliding short-circuits or mobile plates.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: September 2, 2014
    Assignee: Ion Beam Applications, S.A.
    Inventor: Michel Abs
  • Publication number: 20140225534
    Abstract: A radiotherapy apparatus includes a beam irradiation head (10), a linear accelerating means (20) provided at the beam irradiation head (10), a robot arm (30) connected with the beam irradiation head (10) and having a plurality of joints, a waveguide (40) built in the robot arm 30 and connected with the linear accelerating means (20), and an electromagnetic wave oscillator (50) disposed outside the robot arm (30) and generating electromagnetic waves so that the electromagnetic waves are propagated to the linear accelerating means (20) through the waveguide (40).
    Type: Application
    Filed: February 12, 2014
    Publication date: August 14, 2014
    Applicant: Korea Atomic Energy Research Institute
    Inventors: Byung Cheol Lee, Byeong-No Lee, Seungho Kim, Kyung-min Jeong, JongSeo Chai, Ki Baek Song, Hyung Dal Park, SeungWook Shin, SeungHyun Lee, JongChul LEE
  • Patent number: 8803453
    Abstract: A method for generating stabilized particle acceleration by a radio-frequency (RF) accelerator is described, comprising operating the accelerator in a warm-up mode during a warm-up time period, without injecting charged particles or without accelerating injected charged particles, and operating the accelerator in a beam-on mode during a beam-on time period after the warm-up time period, to accelerate charged particles injected by the charged particle source. Automatic frequency control to match an expected frequency of the accelerator during the beam-on time period, prior to the start of the beam-on time period, for stability, is also described.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 12, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventors: Douglas W. Eaton, Gongyin Chen, Timothy R. Fox
  • Patent number: 8791656
    Abstract: An example particle accelerator includes a magnet to generate a magnetic field, where the magnet includes first superconducting coils to pass current in a first direction to thereby generate the first magnetic field, and where the first magnetic field is at least 4 Tesla (T). The example particle accelerator also includes an active return system including second superconducting coils. Each of the second superconducting coils surrounds, and is concentric with, a corresponding first superconducting coil. The second superconducting coils are for passing current in a second direction that is opposite to the first direction to thereby generate a second magnetic field having a magnetic field of at least 2.5 T. The second magnetic field has a polarity that is opposite to a polarity of the first magnetic field.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 29, 2014
    Assignee: Mevion Medical Systems, Inc.
    Inventors: Gerrit Townsend Zwart, James Cooley
  • Patent number: 8786217
    Abstract: The disclosure relates to systems and methods for fast-switching operating of a standing wave linear accelerator (LINAC) for use in generating x-rays of at least two different energy ranges with advantageously low heating of electronic switches. In certain embodiments, the heating of electronic switches during a fast-switching operation of the LINAC can be kept advantageously low through the controlled, timed activation of multiple electronic switches located in respective side cavities of the standing wave LINAC, or through the use of a modified a side cavity that includes an electronic switch.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: July 22, 2014
    Assignee: Accuray Incorporated
    Inventors: Ching-Hung Ho, Stephen Wah-Kwan Cheung, Roger Heering Miller, Juwen Wang
  • Patent number: 8779697
    Abstract: An RF cavity includes a chamber, a conductive wall that encloses the chamber and has an inner side and an outer side, a switch arrangement comprising a plurality of solid-state switches arranged along a circumference of the wall around the chamber, wherein the solid-state switches are connected to the conductive wall such that RF currents are induced in the conductive wall when the switch arrangement is activated, as a result of which RF power is coupled into the chamber of the RF cavity, and a shielding device located on the outer side of the conductive wall, along a circumference of the RF cavity, the shielding device configured to increase the impedance of a propagation path of RF currents along the outer side of the wall such that the RF currents coupled into the wall are suppressed on the outer side of the wall.
    Type: Grant
    Filed: October 18, 2010
    Date of Patent: July 15, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Arnd Baurichter, Oliver Heid, Timothy Hughes
  • Patent number: 8771480
    Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: July 8, 2014
    Assignee: Xyleco, Inc.
    Inventor: Marshall Medoff
  • Patent number: 8760086
    Abstract: An accelerator for accelerating two beams of charged particles and for producing a collision of the beams includes: an apparatus for producing an electrostatic potential field such that the two beams are acceleratable or deceleratable by the electrostatic field, a reaction zone for collision of the charged particles; first and second acceleration distances for the first and second beams, each acceleration distance directed towards the reaction zone, wherein the reaction zone is arranged geometrically with respect to the potential field and to the acceleration distances such that the particles of the beams are acceleratable towards the reaction zone along the first and second acceleration distances and, after interaction in the reaction zone and passage through the reaction zone, are deceleratable in the potential field, such that energy used by the potential field apparatus for accelerating the beams towards the reaction zone can be at least partially recovered by the deceleration.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 24, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Heid
  • Patent number: 8760055
    Abstract: An electron cyclotron resonance ion generator includes a vacuum-tight chamber configured to contain a plasma, a magnetic field generator configured to generate a magnetic field in the chamber, a waveguide configured to propagate a high-frequency wave inside the chamber, a first ionization stage located at one end of the chamber, the first stage including an ionization zone in which ions are generated, the magnetic field being approximately parallel to a longitudinal axis in the ionization zone, a second magnetic confinement stage for the ions generated in the ionization zone, the second stage using a first high-frequency wave being propagated in the chamber from the waveguide, the magnetic field being approximately parallel to the longitudinal axis between the ionization zone and the second confinement stage, such that the ions generated in the ionization zone migrate towards the second confinement stage and the first and second stages contain the same continuous plasma.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: June 24, 2014
    Assignees: Commissariat a l'energie atomique et aux energies alternatives, Centre National de la Recherche Scientifique
    Inventors: Jean-Yves Pacquet, Gabriel Gaubert
  • Patent number: 8754596
    Abstract: A DC high voltage source may include a capacitor stack having a first electrode that can be brought to a first potential, a second electrode arranged concentrically with the first electrode and which can be brought to a second potential different from the first potential, at least one intermediate electrode arranged concentrically between the first and second electrodes and which can be brought to an intermediate potential between the first and second potentials, a switching device for charging the capacitor stack, to which switching device the electrodes of the capacitor stack are connected and which is configured such that upon operation of the switching device the electrodes of the capacitor stack arranged concentrically with respect to each other can be brought to increasing potential levels, wherein the switching device comprises electron tubes, e.g., controllable electron tubes. A particle accelerator comprising such a DC high voltage source is also provided.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: June 17, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Heid
  • Patent number: 8747624
    Abstract: Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 10, 2014
    Assignee: Xyleco, Inc.
    Inventor: Marshall Medoff
  • Patent number: 8742700
    Abstract: An accelerator assembly includes a first chip and a second chip. An acceleration channel is formed into a surface of a first side of the first chip. The first side of the first chip is covalently bonded to a first side of the second chip such that the channel is a tubular void between the first and second chips. The channel has a tubular inside sidewall surface, substantially no portion of which is a metal surface. The channel has length-to-width ratio greater than five, and a channel width less than one micron. There are many substantially identical channels that extend in parallel between the first and second chips. In one specific example, the assembly is part of a Direct Write On Wafer (DWOW) printing system. The DWOW printing system is useful in semiconductor processing in that it can direct write an image onto a 300 mm diameter wafer in one minute.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: June 3, 2014
    Assignee: Transmute, Inc.
    Inventors: Kim L. Hailey, Robert O. Conn
  • Patent number: 8742699
    Abstract: A charged particle beam generator, a charged particle irradiation system, a method for operating the charged particle beam generator and a method for operating the charged particle irradiation system, which allow a charged particle beam to be injected into a circular accelerator at an arbitrary timing and can reduce an irradiation time and a time for a therapy, are provided while maintaining the lower limit of an operation cycle of a linear accelerator. An accelerator control device controls an operation of a synchrotron on the basis of a beam extraction request signal transmitted from a beam utilization system control device. A control device generates a timing signal notifying the linear accelerator of an injection timing of a next operation cycle of the synchrotron after completion of an extraction process performed by the synchrotron, changes an operation timing of the linear accelerator so that the operation timing of the linear accelerator matches the injection timing.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: June 3, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Masumi Umezawa, Yoshifumi Hojo